A.800 B.1050 C.1100 D.1200
A.停止 B.繼續(xù) C.小心 D.查看
A.14.7 B.15.7 C.16.7 D.17.7
A.應(yīng)先安裝縱向水平桿,后安裝橫向水平桿 B.應(yīng)先安裝橫向水平桿,后安裝縱向水平桿 C.隨意無順序 D.A和B
A.1/200 B.1/300 C.1/150 D.1/100